Don't believe for a moment that you don't need to be challenged. Each one of us needs a mountain to climb, even it's nothing more than a hill. Why? Because the mountain is a tangible symbol of the need we all have to achieve. Without climbing the mountains in our lives we can never be sure that we have reached our potential in life. Some out-of-the-ordinary task must be taken on in order to increase our confidence that we are not just coasting through life. I think that's one of the reasons I began to run marathons. It was the need to try something I thought myself incapable of. No one who finishes a marathon is the same person that started the race.
I hope there's a mountain of some sort in your life. We all need meaningful goals, don't we?